This Decorative Cap Light comes with bulb
socket, bulb, and 12 Volt wiring. Designed to attach to CRL 4 x 4 inch (101.6
millimeter) Vertical Aluminum Posts to give your railing system a unique
appearance and natural glow. Made from solid cast aluminum, this post light is a
safe and sturdy component for our railing line. (Please consult a local
electrician for wiring instructions and power supply.)